Perhaps you should try some spelling variations:
"_ robust e. hellman book" » "_ robust e. hellman joel", "_ robust _. hellman book"
"a robert e. heitmann book" » "gal robert e. heitmann book", "a robust e. heitmann book", "a robert _. heitmann book", "a robert j. heitmann book", "a robert e. heinemann book", "a robert e. hermann book", "a robert e. hartmann book"
"a robert e. heimann book" » "gal robert e. heimann book", "a robust e. heimann book", "a robert _. heimann book", "a robert j. heimann book", "a robert e. hermann book", "a robert e. heinemann book"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("a robert e. heitmann book") OR ("a robert e. heimann book"))) or ("_ robust e. hellman book"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("a robert e. heitmann book") OR ("a robert e. heimann book"))) OR ("_ robust e. hellman book")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"a robert e. heitmann book\") OR (\"a robert e. heimann book\"))) or (\"_ robust e. hellman book\"))".
• Removing quotes may allow a broader search: (((( a robert e. heitmann book ) OR ( a robert e. heimann book ))) or ( _ robust e. hellman book )).
• Adding a wildcard symbol may retrieve word variants: (((("a robert e. heitmann book") OR ("a robert e. heimann book"))) or ("_ robust e. hellman book"))*.